赞比亚卢安夏难浸铜矿石扼酸控杂浸出技术研究  

Study on Leaching Technology of Acid and Impurity Control of Refractory Copper Oxide from Luanshya

作　　者：刘亚平 傅钰辉 尹君 李阳 邓洁 孙春宝[2] 寇珏[2] LIU Yaping;FU Yuhui;YIN Jun;LI Yang;DENG Jie;SUN Chunbao;KOU Jue(CNMC Luanshya Copper Co.,Ltd.,Luanshya 999134,Zambia;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中色卢安夏铜业有限公司,赞比亚卢安夏999134 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《金属矿山》2024年第8期100-105,共6页Metal Mine

基　　金：国家自然基金科学资助项目(编号:5197040779)。

摘　　要：赞比亚卢安夏穆利亚希氧化铜矿石性质复杂,原采用常规加温搅拌浸出工艺处理,但浸出液中杂质离子含量高,影响了后续萃取—电积作业。为实现该矿石的高效清洁利用,开展了分支加酸扼酸控杂浸出试验研究。结果表明:在磨矿细度-200目占70%、硫酸用量45 kg/t、矿浆浓度40%、搅拌强度300 r/min,浸出温度65℃的条件下,对矿石进行常规浸出试验,铜的浸出率为80.35%,铁的浸出率为8.81%,锰的浸出率为39.38%;采用分支加酸工艺,在硫酸用量37.5 kg/t,各段加酸比例分别为30%、25%、20%、15%、10%、0,各段浸出时间均为40 min的条件下,分支加酸浸出试验的铜浸出率为83.29%,铁浸出率为7.78%,锰浸出率为34.86%。与常规加酸工艺相比,硫酸总用量减少了7.5 kg/t,铜的浸出率提高了2.94个百分点,铁和锰的浸出率分别下降了1.03和4.52个百分点;现场应用分支加酸技术,在铜浸出率不低于82%的前提下,吨铜硫酸用量降低0.6 t,浸出液中铁离子和锰离子的浓度分别下降0.75 g/L和0.70 g/L;新工艺在不新增设备和药剂的情况下即可达到提铜降酸控杂的目的,有效降低了吨铜生产成本,提高了料液质量,可为实现同类氧化铜矿的高效清洁浸出提供新的研究思路。Luanshya Muliashi copper oxide ore in Zambia has complex properties.It was originally treated by conventional heating stirring leaching process,but the content of impurity ions in the leaching solution is high,which affects the subsequent extraction-electrowinning operation.In order to realize the efficient and clean utilization of the ore,the experimental study on the acid and impurity control leaching by branch acid addition is carried out.The results show that under the conditions of grinding fineness of-200 mesh accounting for 70%,sulfuric acid dosage of 45 kg/t,pulp concentration of 40%,stirring intensity of 300 r/min and leaching temperature of 65℃,the conventional leaching test of ore is carried out.The leaching rate of copper is 80.35%,the leaching rate of iron is 8.81%,and the leaching rate of manganese is 39.38%.Under the conditions of sulfuric acid dosage of 37.5 kg/t,acid addition ratios of 30%,25%,20%,15%,10%and 0 in each stage,and leaching time of 40 min in each stage,the copper leaching rate of branch and acid addition leaching test is 83.29%,the iron leaching rate is 7.78%,and the manganese leaching rate is 34.86%.Compared with the conventional acid addition process,the total amount of sulfuric acid is reduced by 7.5 kg/t,the leaching rate of copper is increased by 2.94 percentage points,and the leaching rates of iron and manganese are decreased by 1.03 and 4.52 percentage points,respectively.Branch acid addition technology is applied on site,on the premise that the copper leaching rate is not less than 82%,the dosage of sulfuric acid per ton of copper is reduced by 0.6 t,and the concentration of iron ion and manganese ion in the leaching solution is reduced by 0.75 g/L and 0.70 g/L,respectively.The new process can achieve the purpose of copper extraction,acid reduction and impurity control without adding new equipment and reagents,effectively reducing the production cost per ton of copper,improving the quality of feed liquid,and providing a new research idea for the efficient and clean leaching

关 键 词：氧化铜矿 结合氧化铜 加温搅拌浸出 浸出控杂 分支加酸 

分 类 号：TD952[矿业工程—选矿] TD811